package com.sky.interceptor;

import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import org.springframework.web.method.HandlerMethod;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//创建微信小程序端的拦截器
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {
    @Autowired
    private JwtProperties jwtProperties;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if(!(handler instanceof HandlerMethod)){
            return true;
        }
        //从请求头获取token令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());
        try {
            //校验令牌
            log.info("jwt校验：{}", token);
            log.info("请求 Header 中的 token: {}", request.getHeader("token"));
            //根据密钥和token进行解析出负载
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            BaseContext.setCurrentId(userId);
            log.info("当前用户id：{}", userId);
            return true;
        } catch (NumberFormatException e) {
           response.setStatus(401);
           return false;
        }
    }
}
